JP3640647B2 - Method for forming union composite filter material using aerodynamic power - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention utilizes aerodynamic power Method for forming union composite filter material About.
[0002]
[Prior art]
There are already many mature technologies in the application field of chemical pollution protection filter materials, and among them, the technology for supporting functional fine particulate materials such as activated carbon in a fiber network is the mainstream. Many invention literatures detail the production techniques for this type of filter material. For example, US Patent Nos. 4,795,668, Krueger et al, 4,868,032, Eian et al, and 5,486,410, a fixed and functional functional particulate material disclosed in Groeger et al. All of the related technologies, including, are mainly applied to the manufacturing process of adsorption filter materials, using fibers as adhesives, adhering functional fine particles to fiber structures, filtering air or liquid, and passing toxic pollutants To achieve the purpose of protective filtration.
[0003]
[Problems to be solved by the invention]
In the prior art, nets were manufactured using the melt-Blown method, and functional fine particulate materials such as activated carbon were added during the manufacturing process and adhered to the melt-blown cotton net structure. Since the filter material manufactured by this kind of method has a high pressure drop, it cannot be effectively applied to the production of a filter material having a high fine particle content. Moreover, the melt-blown fibers are fine and the uniformity and stability of the cotton net structure are poor, so that functional fine particles are easily displaced during post-processing and application, and in severe cases, they will fall off and wear out.
[0004]
In a patent published by Groeger et al, a three-dimensional structure formed of composite fibers is used as a carrier, a functional fine particulate material is fixed in the pores of the fiber network, and further integration is performed in the next stage. Achieves the purpose of increasing the content of fine particulate matter, improves the stability of functional fine particulate matter within the filter material structure, and does not fall off during post-processing or application, and has a high content of fine particulate matter Filter materials can be produced. For example, when chemical adsorption protection with activated carbon is used, the expiration date of the filter material has been extended.
[0005]
However, when the three-dimensional structure of the fiber network is used as a carrier and a functional fine particulate material is adhered or fixed to the structure, a certain functionality can be achieved, but the structure is limited to a predetermined form of the carrier. Can only be in a single fixed form. Also, the content of functional particulate material is increased and the service life is extended, but it is not very useful for substantial adsorption or filtration efficiency.
[0006]
Furthermore, in the conventional technology, the fibers are first made into a three-dimensional network structure using a machine, and fine particles are placed using the space between the fibers, and in this process, the appearance of the functional fine particles is displayed. The three-dimensional shape is different and the size of the pores between the fibers is not the same, and it is not easy to control the uniformity of the structural density, so many pores are often filled with functional fine particles. When this occurs, the channeling effect occurs because the resistance at this point is minimized when airflow or liquid passes. Correspondingly, a phenomenon occurs in which the source molecules are not trapped by the functional particulate material, so that the non-uniform structure density can also cause inefficiencies, especially when the layers are layered together, the fiber structure increases the weight of the particulate material. It will not be able to withstand, so the structure will collapse, the structure density will be defective, and the quality of the filter material will be poor.
[0007]
Moreover, even if it tried to make the density of a structure uniform by controlling the coarseness of a fiber and the size of the appearance shape of a fine-grained substance, it was not able to be achieved by various previous technologies. First, since the three-dimensional structure of the fiber is used as a carrier, the form of the structure is limited, and thus the variability cannot be controlled in the manufacturing process.
[0008]
Therefore, regarding the functional filter material, for example, for the adsorptive filter material, in addition to adding the functional particulate material to the fiber structure, it is necessary to consider both the adsorption efficiency and the service life, In addition to structural stability, it must be possible to control structural variability. For example, by depositing a structure that combines the fineness of the fiber and the size of the appearance of the particulate matter to make the density uniform, and to form a non-linear passage, the time for the contamination source to stay in the filter material is increased. Increase the probability of contact with functional substances. By doing so, the function and efficiency of the filter material are increased, the purpose of prevention and treatment of chemical contamination is achieved, and the application field can be further expanded.
[0009]
The main object of the present invention is to utilize aerodynamic power to produce a chemiprotective filter material in the form of a sheet-like nonwoven fabric by utilizing a stable air flow and dispersing, mixing, weaving and composite molding. Method for forming union composite filter material Is to provide.
Another object of the present invention is to utilize air power that is highly stable, can control the mixing ratio, can be molded in the same time, has very good deposition density uniformity, and does not cause any defects in the structure. Method for forming union composite filter material Is to provide.
[0010]
A further object of the present invention utilizes aerodynamic power to achieve optimal airflow resistance and chemisorption efficiency. Method for forming union composite filter material Is to provide.
Another object of the present invention is to utilize aerodynamic power that makes the probability of passing through the surface of the fiber and the surface of the functional particulate material uniform, further increases the stability of the structure and greatly improves the overall efficiency. Method for forming union composite filter material Is to provide.
[0011]
[Means for Solving the Problems]
In order to solve the above problems, the aerodynamic power described in the claims of the present invention is used. The method of forming the union composite filter material is , With aerodynamic power as the main key, followed by the use of special heat treatment methods, with short-cut fibers as the basic raw material, and functional fine particulates (eg activated carbon, potassium permanganate immersion oxidation) A stable air stream is used as a basic raw material such as aluminum and chemically adsorbed polymers.
[0012]
Further, the aerodynamic power described in the claims of the present invention was used. The method of forming the union composite filter material is Based on aerodynamic force, fibers and fine particles are simultaneously mixed and deposited, and the fiber forming network is dispersed and deposited without being a precursor, and the density of the airflow is stable. In addition, the two substances are interwoven and fixed to each other, dispersed and mixed using an air stream, conveyed, and finally deposited and molded. And the fine particulate material changes from a low content to a high content, and it is not necessary to take a method of layering and stacking.
[0013]
Moreover, the aerodynamic power described in the claims of the present invention was used. The method of forming the union composite filter material is Since the flow resistance of the airflow changes during molding by airflow power, a single filter material can be formed simultaneously to form a sparse to dense three-layer structure, and at the same time, the mutual ratio of the three-layer structure is controlled. With regard to mutual blending of fiber fineness change selection and appropriate fine particulate material size, airflow resistance and residence time can be controlled at the same time even if molding is performed using airflow power, and efficiency is increased accordingly. Therefore, the elements that change the structure can be fully understood, and the controllability of quality is high.
[0014]
Moreover, the aerodynamic power described in the claims of the present invention was used. The method of forming the union composite filter material is In addition, the filter material obtained by the composite weaving using airflow power has a uniform deposition structure and uniform airflow passage resistance against molding. However, with regard to the adsorptive filter material, for example, with regard to the activated carbon filter material, if the air flow that is the source of contamination passes, the probability that the chemical pollutant molecules will be captured and adsorbed by the closer to the surface of the adsorbent (activated carbon). Based on this, if the filter material after molding is heat-treated using special heat treatment technology after molding according to the present invention, the fiber surface melts and adheres to the surface of the functional fine particulate material, and the fiber assembly Since the surfaces of the body can also be bonded, the strength of the heat treated filter material structure is improved. Furthermore, the fiber shrinks during heat melting, and the pores at the fiber aggregate interface become dense and small due to the shrinkage. Therefore, the interface between the fiber aggregate and the fine particulate matter cannot move and shrink due to steric hindrance between the fine particulate matter, and the pores are not formed. This enlarges the specific path of the polluted airflow, and the path formed by the three spatial three-dimensional structures in the filter material structure is a non-linear and irregular route, which makes the chemical pollutant molecules mainly functional. In addition to increasing the probability of contact through the surface of the fine particulate material, the time for staying in the filter material structure is lengthened, so that the trapping adsorption time is also lengthened.
[0015]
As can be seen from the above, if the technology of the present invention is used, the controllability of the micro structure of the functional filter material becomes extremely good, and the variability can be adapted to a wider range of application fields, quality, function In terms of efficiency, it is superior to conventional products. In addition, since the above-mentioned technology is already in the stage of skilled mass production, we apply for this patent here and hope that this technology can contribute to the prevention of environmental chemical contamination, which is becoming more serious.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
As shown in FIG. 1 and FIG. 2, the forming method of the union composite filter material using aerodynamic power according to one embodiment of the present invention and the procedure for implementing the structure include the following.
(A) The short fiber 1 and the functional fine particulate material 2 are respectively sent to the composite gas blowing device 3 using an air flow, and an air flow for conveying the fine particulate material is provided in the middle of the composite gas blowing device 3. Although the function of the blast device 3 here is the same as that of the blast device, the shape is not limited to a circle, and in a preferred embodiment, the shape is rectangular, the blast port is elongated, and two conveying airflows are simultaneously diffusively mixed and conveyed. It enters the section 4 and diffuses the short fibers and the fine particulate matter from the top to the bottom by the mixed conveying airflow 41 and also sends the airflow stably to the lower multilayer composite molding section 5 through the flow guide device 42.
[0017]
(B) Using the intake device 51 provided below the multilayer composite molding section 5, the short fibers 1 and the fine particulate matter 2 are sequentially adsorbed and deposited on the moving forming net 52, and if necessary, the intake device 51 By adjusting the amount of intake air and balancing with the mixed carrier airflow 41, a filter material having a three-layer structure that gradually forms a sparse to dense layer on the moving forming net 52 is obtained.
[0018]
(C) The molded filter material 8 is sent to the heat treatment fixed section 6 and heated from above by the heat source 61 to control the heating temperature to 120 to 180 ° C. At this time, the intake device 62 is used below the filter material 8. Inhale continuously.
(D) The heated and shaped filter material 8 is sent to the cooling section 7, and at this time, the air is continuously sucked downward using the intake device 71 during cooling.
[0019]
The functional particulate material 2 may be a material such as activated carbon, potassium permanganate-immersed aluminum oxide, or a chemisorbed polymer.
Further, the diffusive mixing / conveying section 4 is a box-shaped container 43 opened downward, and the flow guide device 42 provided in the inside is composed of several pieces of flow guide plates.
[0020]
By the above-described technology, the carrier airflow 11 of the short fibers 1 passes through the composite gas blast device 3 and merges with the carrier airflow 21 of the functional fine particulate material 2 at this location. After the fixed amount is sent by using, the mixed gas blast device 3 is entered by the carrier airflow 21, and the mixed carrier airflow 41 of two kinds of materials enters the diffusion mixed carrier zone 4 at the same time. Since the fluid area increases when the air current leaves the blast device, turbulence occurs here, causing the short fibers 1 and the functional fine particulate matter 2 to diffusely mix with each other, and in the lower half of the area accordingly. The air flow 41 is stably conveyed to the multilayer composite molding section 5 by the special flow guide device 42.
[0021]
In the diffusive mixing / conveying section 4, three remarkably divided air flow areas are formed by the composite gas blowing device 3, and as shown in FIG. 3, the left and right sides A1, A3 are mainly fiber areas, and the middle A2 is fibers. In the mixed activated carbon area, this phenomenon forms a remarkable layered structure in the subsequent molding, and the outlet of the composite gas blowing device 3 is designed to be adjusted. , A2 and A3 can be controlled with respect to each other, the cross-sectional structure of the filter material can be changed, and if necessary in the future, the blast apparatus can be adjusted to meet the requirements.
[0022]
Molding is performed after the mixed airflow has passed through the flow guide device 42. At this stage, the short fibers 1 and the fine particulate matter 2 are mainly deposited on the moving molding net 52 by using the air intake device 51, and the molding net is obtained. 52 is moved forward using the transport device 53, and the air intake device 51 is adjusted so that the intake air amount and the transport air flow 41 are kept in balance, so there is no difference in the speed of the air flow on both sides of the molding surface. If the intake air amount is insufficient, the conveying air flow 41 blows the short fibers 1 and the functional fine particulate matter 2 so that molding is not performed. If the intake air amount is too large, the conveying speed of the diffusion mixing conveyance section 4 is affected. This material is easily formed rapidly before the mixed union is made uniform, and the uniformity of the filter material structure is destroyed. Therefore, it is absolutely necessary to adjust the intake device 51 at the time of forming. When diffusing and mixing at the time of molding, three air flow zones A1, A2, and A3 are formed. Similarly, when molding on the molding net 52, three-stage molding is formed, as shown in FIG. In stage I, the bottom layer fibers gather and accumulate, and the forming net 52 moves continuously. Accordingly, the process proceeds to stage II, where the short fibers 1 and the fine particulate matter 2 are interwoven and accumulated. The final stage III fiber assembly is further deposited thereon to form a functional filter material having a substantially three-layer structure.
[0023]
At the time of molding, all three stages proceed in the same way, and the conveying airflow 41 conveys the mixture of the short fibers 1 and the fine particulate matter 2 onto the forming net 52, and the conveying airflow 41 is eliminated by the intake device 51, and the entire process is performed. All the airflows move in a stable state, and the airflow stably passes through the formed structure. The main point of forming by air power is control at this stage, and the cross-sectional structure of the initial filter material 8 after forming is in the bottom layer of the formed filter material as shown in FIG. And a protective layer 81 in a densely deposited state, and above the protective layer, the functional fine particulate material 2 is a main component, and the fibers are uniformly interwoven with short fibers. Deposited in a three-dimensional structure, the density of the functional fine particulate material is sparse, and the pore density of the heat-stabilized short fiber aggregate is dense and non-linear at the interface between the short fiber and the surface of the functional fine particulate material. A striking three-layer structure including an adsorbing layer 82 that forms a gas flow path of the gas and a uniform fluidized bed 83 that is above the adsorbing layer 82 and has a short fiber 1 as a main component and exhibits a sparsely deposited state. It has a structure.
[0024]
As described in the above description, this split layer structure is generated by the short fiber 1 and the fine particulate material 2 forming the three flow divisions A1, A2, and A3 in the diffusion mixing and conveying section 4, and the short fiber When the mixed conveying air flow 41 of 1 and the fine particulate material 2 is simultaneously deposited and molded, the left fiber section I is first deposited and formed on the forming net 52, and then shortly in the intermediate section II of the forming net 52 above it. Since the fiber 1 and the fine particulate material 2 are interwoven and deposited, and the fiber net aggregate already formed at the bottom can prevent the fine particulate material 2 from being carried away by the air flow at this time, the short fiber 1 and the fine particles The interwoven mixed assembly of the fibrous material 2 is uniformly deposited and finally transported to the right molding zone III, where the fibers are again deposited on the top of the filter material, where the airflow molding stage ends.
[0025]
At this stage, the forming method and the structure of the union composite filter material using air power according to an embodiment of the present invention mainly uses aerodynamic forming, and the short fiber 1 and the fine particulate material 2 are deposited and weaved simultaneously. In addition to achieving the purpose of molding, the filter material 8 has a three-dimensional structure, so that the deposition density of the three-layer structure also has an effect of gradually forming layers from sparse to dense, as shown in FIG. In the forming stage I, the conveying airflow 41 has only the dispersed ultrashort fibers 1 in the shunting section A1, and is deposited on the forming net 52 first, and the height of the deposited layer is low. Has a high flow rate when passing through this zone, can increase the density of short fibers, has a dense structure, small pores between the short fibers, and the three-dimensional structure of the short fiber aggregate is uniform because the airflow is stable. The protective layer 81 structure is formed on the bottom of the filter material. There is formed. As the short fibers and fine particulate matter are interweaved and deposited on the protective layer 81, the height of the deposited layer gradually increases, so the air flow velocity is correspondingly reduced in this structure, and the short fibers 1 simultaneously become fine particulate matter 2 Since the two materials have different three-dimensional appearances, the composite structure density is more sparse compared to the density of the pure fiber aggregate structure of the protective layer 81, and is in the middle of the filter material 8. The main adsorbing functional area, that is, the adsorbing layer 82 is formed, and short fibers and fine particulate materials are simultaneously weaved and deposited by aerodynamic molding and filled with each other to make the structural density uniform and the dispersion density of both uniform. As a result, there are no defects or holes in the structure. Further, at this time, since the appearance layer height of the entire filter material gradually increases, the resistance to the airflow also increases correspondingly, and finally the short fiber conveying airflow 41 carries the short fibers to the branching section A3 in the right side III of the molding section. Since the gas flow velocity is large and the resistance that is received in this molding section is large and deposited on the adsorbing layer 82, the speed of passing through the structure is the lowest, the fiber deposition density is sparse and uniform, and the uniform fluidized bed of the filter material 83, the pores between the structural fibers are relatively large, but the uniformity is high.
[0026]
Speaking of filter materials with activated carbon as the above functional fine particulate material, when the filter material structure has a sparse to dense layered structure, the adsorption efficiency is superior to the efficiency of the single filter material structure. become. When the pollution source airflow passes through the filter material, the direction of the airflow is, as shown in FIG. 4, when the solid fluidized bed 83 enters the uniform fluidized bed 83 and flows out of the protective layer 81. Since it is uniformly dispersed when passing through one aggregate of fibers, the area of the activated carbon adsorption layer 82 through which the contamination source passes increases, and the air flow of the contamination source is uniformly diffused to enter the activated carbon fiber interwoven layer, and the layer of the filter material that passes therethrough As the height increases, the flow velocity of the airflow also decreases due to diffusion and resistance, so that the residence time of the contaminating molecules increases, and at the same time, it is adsorbed by the activated carbon, and in the protective layer 81 of the filter material 8 Since the deposited structure is dense, the resistance generated against the airflow is maximized, so that the residence time of the contaminated airflow in the adsorption layer 82 can be controlled accordingly. This technology can adjust the area ratio of the airflow diversion areas A1, A2 and A3 in the design of the composite gas blast apparatus 3, and control the ratio of the deposited layer height of the filter material structure division layer at the time of molding. Based on the conditions necessary for filtering and adsorbing the contamination source, it is possible to meet the user's needs by adjusting the moderation moderately, and the height of the deposited layer of the protective layer 81 is higher. Sometimes the airflow resistance of the entire filter material 8 increases, the residence time of the contaminating molecules increases, the adsorption efficiency increases, and vice versa.
[0027]
The uniform fluidized bed 83 and the protective layer 81 of the filter material structure sandwich the adsorption layer 82 in the middle, and the activated carbon granules 2 can be prevented from moving or dropping, and the short fibers of the adsorption layer 82 and the activated carbon 2 are interwoven and formed simultaneously. Since the structure can also prevent the activated carbon granules from moving and leaving, the structure of the filter material 8 as a whole after molding is highly stable and excellent in uniformity. In the structure of the filter material, the mixing ratio of the short fiber and the activated carbon can be quantified and controlled in the manufacturing process. In this example, the content of activated carbon is controlled to 10 to 90%, and the content of short fibers is correspondingly controlled within this range, so that both the structure and the two material dispersions maintain a certain degree of uniformity. Since the structure having a relatively high or low content is less for general practical adsorptive filtration applications, the overall function of the filter material 8 is when the optimum content of activated carbon is 60 to 90% after the experiment. Optimally, the fiber content was optimally 15-40%. Regarding the change in the basic weight of the entire filter material, if this manufacturing process is used, a low weight of 100 g / m ² High weight 1,200g / m ² Can be simultaneously molded, and the purpose of high weight or high content can be achieved without using layer-to-layer stacking. For this reason, the composite molding technology using aerodynamics can control the content ratio of the composition and the change in the basic weight of the filter material at the same time. Therefore, the development value of this manufacturing technology is high.
[0028]
In addition, various fiber diameters (ie, the number of deniers) can be selected according to the change in the basic weight of the filter material. If the basic weight of the filter material is light or thin, if the fiber diameter is large, the holes to be formed will be larger and the activated carbon will be larger. In order to fix in the pores between the fibers, the size of the granules must be increased, so that the amount of activated carbon per unit increases, and the weight of the basic weight is reduced, the number of activated carbon granules in the filter material area must be reduced accordingly. Therefore, the distribution of the activated carbon is sparse and non-uniform, and the adsorption efficiency is not greatly reduced. If the diameter of the fiber is reduced, a three-dimensional network structure can be formed only by increasing the number of fiber roots in a unit area, thereby reducing the pores between the fibers. The filter material cannot be uniformly and completely entered, the structural stability is inferior, and the activated carbon is highly worn. In this example, this embodiment discloses a manufacturing process in which the short fiber 1 and the activated carbon 2 are simultaneously mixed using aerodynamic power, and weaving and forming are performed once. Since it is formed with union, no matter how the fiber diameter or the size of the activated carbon granules changes, it is possible to produce an adsorption filter material with high uniformity and high structural stability if the combination of both is appropriate. it can.
[0029]
At the time of forming the filter material, the main adsorption function is achieved by the mixed interweaving of short fibers and activated carbon, that is, the adsorption layer 82. The two substances are dispersed and mixed in an air flow, and then deposited and molded. Since the three-dimensional appearance is different, the transport fluidity in the air current is also different and the deposition density is also different. The activated carbon granules 2 have an irregular solid shape, and the gap between the granules is obstructed by the steric hindrance in the process of airflow molding deposition, so that the pores between the activated carbon granules 2 become large, and as shown in FIG. The pores formed between 2 become the main passage of the airflow when the airflow power passes through, but the activated carbon granules become an obstacle, and at the same time, the ultrashort fiber 1 with the forming airflow becomes higher in fluidity according to the dispersion of the airflow. In addition to being filled into the pores of the activated carbon 2 and blocked by the activated carbon granules, the fiber aggregate network 1 is deposited, the resistance of the entire airflow is averaged, and the flow velocity of the passing airflow is made uniform, forming The adsorption layer structure of the subsequent filter material is stable, and the uniform dispersion and weaving of the short fibers 1 and the activated carbon 2 becomes a three-dimensional structure with a uniform deposition density, and as shown in FIG. To get this structure It can be.
[0030]
However, after the short fiber 1 and the activated carbon 2 are mixed and molded, when the airflow passes, the airflow portion flows too much from the surface of the activated carbon due to the steric hindrance of the activated carbon 2, and most passes between the fiber assemblies 1. Therefore, since the deposition density between the short fiber aggregates 1 is formed by aerodynamic force, the density is uniform, the resistance to the airflow is uniform, and the airflow resistance provided by the activated carbon granules 2 is lower. When the adsorbed and filtered by the filter, most of the contaminating molecules pass between the short fibers 1 and the fiber aggregates are connected in a penetrating manner. It is not possible to exert a substantial effect on.
[0031]
Therefore, a structure that forms a non-linear airflow path to increase contact with the activated carbon surface is a key key to the functionality of the activated carbon adsorption filter material. There is no suggestion of manufacturing process technology to achieve. In the air-powered composite molding technique according to one embodiment of the present invention, first, a gas is used as power, and the short fiber 1 and the activated carbon 2 are uniformly dispersed and interwoven to form a three-dimensional structure. As shown in FIG. 3, the filter material 8 after molding must be subjected to a special heat treatment by providing absolutely high uniformity between them. The formed filter material 8 is sent to the heat treatment fixed section 6 using the forming net 52. At this time, the single layer positioning forming net 54 is provided above the filter material 8, and the heat treatment temperature is 120 to 180 ° C. However, it is determined by the production speed and the basic weight of the filter material. The heat treatment method is not a simple radiation irradiation or hot air circulating heating method, but heats far infrared rays using the heat source 61 above the filter material 8 and simultaneously sucks air under the filter material 8 using the intake device 62. The purpose of this is to pass the hot air flow through the filter material 8, uniformize it with heat, and when sucking in, the air is sucked from below the filter material 8. The closer to the intake side, the greater the suction force. In the opposite case, the suction force becomes smaller. Therefore, the filter material 8 receives heat, and at the same time can maintain a remarkable sparse to dense structure. It can have an absolute effect on the adsorption functionality. When the heat-treated filter material leaves the heat treatment chamber, it enters the cooling zone, and even when cooled, the intake device 71 continuously sucks the air downward, mainly in the process from molding to heat treatment and cooling winding, Structural consistency, that is, a three-dimensional structure from sparse to dense is ensured.
[0032]
Further, when the short fiber 1 undergoes heat treatment and reaches the softening point temperature, the surface of the fiber starts to melt, a heat shrink phenomenon occurs in the fiber, and when the surface melts, the surfaces of the short fiber 1 and the activated carbon 2 are mutually In addition, since the short fibers and the short fibers are bonded to each other and shrink, the filter material 8 after the heat treatment has a significant increase in structural strength and stability due to the bonding effect of the fibers. Since the flexibility is maintained, the filter material has good bendability and good workability. Furthermore, in the case of activated carbon 2, the heat treatment does not melt or shrink the surface, but heat desorbs and regenerates the activated carbon. Because it is the main energy, the activated carbon has the effect of dehumidification and reactivation, and the best adsorption function of activated carbon can be maintained, and if this bonding method is used, the structure can be strengthened by using any adhesive Need to Ku, does not cover the surface of the activated carbon 2 with an adhesive, the effective adsorption outer surface area is increased, the higher the adsorption function of the correspondingly filter material.
[0033]
When heat-treating, the heat shrinks the fibers, so that the short fiber assembly 1 filled in the pores between the activated carbon and the granules shrinks, and the pores at the interface between the fibers are reduced as shown in FIGS. However, the structural density of the entire fiber assembly 1 becomes dense, correspondingly increases the resistance to air flow, the pores at the interface between the short fibers 1 and the granules 2 also increase, and when the fibers shrink, the activated carbon granules 2 Does not shrink, and because of the steric hindrance, large-scale displacement due to fiber shrinkage does not occur and the pore size remains the same, so the pore between the short fiber 1 and the activated carbon 2 surface increases, and the structure here Becomes sparse. This phenomenon is as shown in the enlarged view of the filter material in FIG. Therefore, when the chemical polluted air flow passes through the activated carbon and is adsorbed by the filter material, it receives resistance of the activated carbon 2 and the fiber assembly 1 after shrinkage, and mainly forms a pore between the fiber and the activated carbon surface in the passage 84. Therefore, the probability that the contaminated molecules in the airflow come into contact with the surface of the activated carbon through the filter material is increased, so that the adsorption efficiency is greatly increased, which is superior to other activated carbon filter materials. Furthermore, the structure of the filter material is a three-dimensional structure, and the resulting passage 84 is a non-linear curved passage, the residence time for the airflow to pass through the filter material is increased, and the activated carbon removes contaminating molecules. The time for adsorption increases and the functionality of the entire filter material also increases.
[0034]
As described above, according to one embodiment of the present invention, a method for forming a composite filter material using air power and a structure thereof are a three-layer filter made of fibers and functional fine particulate material (activated carbon) that are interwoven by air power. This is a technology to mold the material. Not only can the adsorption functional filter material with a uniform structure and high stability be produced, but also the adsorption efficiency can be improved by using special heat treatment to control the structure of the filter material. In addition, the composite and changeability of the product is even better than other adsorptive filter materials.
[Brief description of the drawings]
FIG. 1 is a flowchart of an implementation procedure of a method for forming a union composite filter material using air power according to an embodiment of the present invention.
FIG. 2 is a schematic view showing a manufacturing process of a method for forming a union composite filter material using air power according to an embodiment of the present invention.
FIG. 3 is a schematic view showing filter material union composite molding of a structure of union composite filter material using air power according to an embodiment of the present invention.
FIG. 4 is a side view showing the structure before heat treatment of the adsorption layer of the union composite filter material using air power according to an embodiment of the present invention.
FIG. 5 is a side view showing the structure after heat treatment of the adsorption layer of the union composite filter material using air power according to an embodiment of the present invention.
FIG. 6 is an enlarged view of FIG.
FIG. 7 is an enlarged view of FIG. 5;
[Explanation of symbols]
1 Short fiber
2 Functional fine particulate material
3 Compound gas blast device
4 Diffusion mixing transport zone
5 multilayer composite molding zone
6 Heat treatment routine
7 Cooling area
8 Filter material
41 Mixed transport airflow
42 Flow guide device
51, 62, 71 Intake device
52 Molded net
61 Heat source

Claims (5)

(A) The short fiber and the functional fine particulate material are respectively sent to the composite gas blast device using the air flow, and the transport air flow of the functional fine particulate material is provided in the middle of the composite gas blast device. Simultaneously, the air current enters the diffusion mixing conveyance zone, and the short fibers and the functional fine particulate matter are diffused from the top to the bottom by the mixing conveyance air flow. Transported to the molding zone,
(B) Using the suction device provided below the multilayer composite molding section, the short fibers and the functional fine particulate material are sequentially adsorbed and deposited on the moving molding net (52), and if necessary By adjusting the amount of intake air of the air intake device to balance the mixed carrier airflow, a filter material having a three-layer structure that gradually forms a sparse to dense layer on the moving forming net (52). Forming,
(C) The molded filter material is sent to a heat treatment fixed section, heated by a heat source, and the heating temperature is controlled to 120 to 180 ° C.
(D) sending the heated filter-shaped filter material to a cooling zone;
The forming method of the union composite filter material using the air power characterized by consisting of these procedures.   The method for forming an unwoven composite filter material using air power according to claim 1, wherein the functional fine particulate material is a material such as activated carbon, potassium permanganate-immersed aluminum oxide, or a chemisorbed polymer. .   2. The air power according to claim 1, wherein the diffusion mixing conveyance section is a mixing box body opened downward, and the flow guide device provided in the inside is composed of several pieces of adjustable flow guide plates. Forming method of the combined interwoven composite filter material.   2. The method for forming an interwoven composite filter material using air power according to claim 1, wherein in the heat treatment fixed section, air is continuously sucked using an air suction device below the filter material.   The method for forming an union composite filter material using aerodynamic power according to claim 1, wherein in the cooling section, the air is continuously sucked downward by using an air intake device during cooling below the filter material.

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